LOCATION.--Lat 42° 22’20", long 71°
14’03", Middlesex County, Hydrologic Unit 01090001, on right bank 800
ft downstream from Moody Street Bridge in Waltham and 0.3 mi upstream from
Beaver Brook.
DRAINAGE AREA.--227 mi2, excludes 23.6 mi2 drained by
Stony Brook, from which flow is diverted for municipal supply of Cambridge.
PERIOD OF RECORD.--Discharge: October 1903 to October 1909 (figures of
average weekly discharge, equivalent to records of unadjusted discharge at
present site), August 1931 to current year.
Water-quality records: Water years 1953, 1959, 1968–70.
REVISED RECORDS.--WSP 781: 1933(M). WSP 851: Drainage area. WSP 971: 1942.
GAGE.--Water-stage recorder and concrete control. Datum of gage is 20.02 ft
above sea level. Prior to July 10, 1904, at dam 700 ft upstream and July 10,
1904, to Oct. 2, 1909, at dam 0.7 mi downstream at different datums; discharge
computed from flow over dam and through wheels and gates of Boston
Manufacturing Co. and Waltham Bleachery, respectively.
REMARKS.--Records good. Flow affected by diversion to Mother Brook (station
01104000), diversions to and from basin for municipal supplies, and at times
by water released from Stony Brook Reservoir. Prior to 1960, some regulation
by mills upstream. Low flow completely regulated by Boston Edison Co.
powerplant prior to 1954. Satellite gage-height telemeter at station.
COOPERATION BY.-- Mass. Dept. Of Conservation and Recreation, Division of Urban Parks and Recreation.
